"dh" command prints all the uefi handles used in the system.
=> efi dh 7ef3bfa0: Device Path, Device Path To Text, Device Path Utilities, Unicode Collation 2 7ef31d30: Driver Binding 7ef31da0: Simple Text Output 7ef31e10: Simple Text Input, Simple Text Input Ex 7ef3cca0: Block IO, Device Path 7ef3d070: Block IO, Device Path 7ef3d1b0: Block IO, Device Path, Simple File System 7ef3d3e0: Block IO, Device Path, Simple File System
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Heinrich Schuchardt xypron.glpk@gmx.de --- cmd/efidebug.c | 142 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 141 insertions(+), 1 deletion(-)
diff --git a/cmd/efidebug.c b/cmd/efidebug.c index 56d24a68a515..172d639dd409 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -178,6 +178,142 @@ static int do_efi_show_drivers(cmd_tbl_t *cmdtp, int flag, return CMD_RET_SUCCESS; }
+static const struct { + const char *text; + const efi_guid_t guid; +} guid_list[] = { + { + "Device Path", + DEVICE_PATH_GUID, + }, + { + "Device Path To Text", + EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID, + }, + { + "Device Path Utilities", + EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID, + }, + { + "Unicode Collation 2", + EFI_UNICODE_COLLATION_PROTOCOL2_GUID, + }, + { + "Driver Binding", + EFI_DRIVER_BINDING_PROTOCOL_GUID, + }, + { + "Simple Text Input", + EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID, + }, + { + "Simple Text Input Ex", + EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID, + }, + { + "Simple Text Output", + EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID, + }, + { + "Block IO", + BLOCK_IO_GUID, + }, + { + "Simple File System", + EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID, + }, + { + "Loaded Image", + LOADED_IMAGE_PROTOCOL_GUID, + }, + { + "GOP", + EFI_GOP_GUID, + }, +}; + +/** + * get_guid_text - get string of protocol guid + * @guid: Protocol guid + * Return: String + * + * Return string for display to represent the protocol. + */ +static const char *get_guid_text(const efi_guid_t *guid) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(guid_list); i++) + if (!guidcmp(&guid_list[i].guid, guid)) + break; + + if (i != ARRAY_SIZE(guid_list)) + return guid_list[i].text; + else + return NULL; +} + +/** + * do_efi_show_handles() - show UEFI handles + * + * @cmdtp: Command table + * @flag: Command flag + * @argc: Number of arguments + * @argv: Argument array + * Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure + * + * Implement efidebug "dh" sub-command. + * Show all UEFI handles and their information, currently all protocols + * added to handle. + */ +static int do_efi_show_handles(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + efi_handle_t *handles; + efi_guid_t **guid; + efi_uintn_t num, count, i, j; + const char *guid_text; + efi_status_t ret; + + ret = EFI_CALL(BS->locate_handle_buffer(ALL_HANDLES, NULL, NULL, + &num, &handles)); + if (ret != EFI_SUCCESS) + return CMD_RET_FAILURE; + + if (!num) + return CMD_RET_SUCCESS; + + printf("Handle%.*s Protocols\n", EFI_HANDLE_WIDTH - 6, spc); + printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep); + for (i = 0; i < num; i++) { + printf("%p", handles[i]); + ret = EFI_CALL(BS->protocols_per_handle(handles[i], &guid, + &count)); + if (ret || !count) { + putc('\n'); + continue; + } + + for (j = 0; j < count; j++) { + if (j) + printf(", "); + else + putc(' '); + + guid_text = get_guid_text(guid[j]); + if (guid_text) + puts(guid_text); + else + printf("%pUl", guid[j]); + } + putc('\n'); + } + + EFI_CALL(BS->free_pool(handles)); + + return CMD_RET_SUCCESS; +} + /** * do_efi_boot_add() - set UEFI load option * @@ -677,6 +813,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = { "", ""), U_BOOT_CMD_MKENT(drivers, CONFIG_SYS_MAXARGS, 1, do_efi_show_drivers, "", ""), + U_BOOT_CMD_MKENT(dh, CONFIG_SYS_MAXARGS, 1, do_efi_show_handles, + "", ""), };
/** @@ -739,7 +877,9 @@ static char efidebug_help_text[] = "efidebug devices\n" " - show uefi devices\n" "efidebug drivers\n" - " - show uefi drivers\n"; + " - show uefi drivers\n" + "efidebug dh\n" + " - show uefi handles\n"; #endif
U_BOOT_CMD(